<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>双飞翼布局</title>
  <style type="text/css">
  body {
    min-width: 550px;
  }

  .col {
    float: left;
  }

  #main {
    width: 100%;
    height: 200px;
    background-color: grey;
  }

  #main-wrap {
    margin: 0 190px 0 190px;
  }

  #left {
    width: 190px;
    height: 200px;
    background-color: #0000FF;
    margin-left: -100%;
  }

  #right {
    width: 190px;
    height: 200px;
    background-color: #FF0000;
    margin-left: -190px; /* 双飞翼布局使用margin-left */
  }
  </style>
</head>
<body>
<div id="main" class="col">
  <div id="main-wrap">
    this is main
  </div>
</div>
<div id="left" class="col">
  this is left
</div>
<div id="right" class="col">
  this is right
</div>
</body>
</html>
